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<Title>Boost Graph Library: Trouble Shooting</Title>
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    <h1>Trouble Shooting</h1>

<hr>

With GNU C++, if you see the following error message:
<pre>
boost/type_traits/arithmetic_traits.hpp:243: template instantiation depth exceeds maximum of 17
boost/type_traits/arithmetic_traits.hpp:243:  (use -ftemplate-depth-NN to increase the maximum)
</pre>
then you need to do as the error message advises and increase the
template instantiation depth. Passing the flag
<tt>-ftemplate-depth-30</tt> to g++ usually does the trick.


<hr>
<pre>
error C2784: 'T __cdecl source(struct std::pair<T,T>,const G &)' : 
could not deduce template argument for 'struct std::pair<_T1,_T1>' from
 'class boost::detail::bidir_edge<struct boost::bidirectional_tag,unsigned int>'
</pre>

<p>
VC++ does not support Koenig Lookup, therefore you need to refer to functions defined in the boost namespace
using the <tt>boost::</tt> prefix, i.e., <tt>boost::source(e, g)</tt> instead of <tt>source(e, g)</tt>.

<hr>
<pre>
../../..\boost/property_map.hpp(283) : error C2678: binary '[' : no operator defined
 which takes a left-hand operand of type 'const struct boost::adj_list_edge_property_map<struct
 boost::bidirectional_tag,struct boost::property<enum boost::edge_weight_t,int,struct 
 boost::no_property>,unsigned int,enum boost::edge_weight_t>' (or there is no acceptable conversion)
</pre>

<p>There is a VC++ bug that appears when using <tt>get(property,
graph, edge)</tt>. A workaround is to use <tt>get(get(property,
graph), edge)</tt> instead. <i>Note that <tt>boost/property_map.hpp</tt> has
now been moved to <tt>boost/property_map/property_map.hpp</tt>.

<hr>

<pre>
C:\Program Files\Microsoft Visual Studio\VC98\INCLUDE\xmemory(59) : fatal
error C1001: INTERNAL COMPILER ERROR
        (compiler file 'msc1.cpp', line 1786)
</pre>

<p>There can be many reasons for this error, but sometimes it is
caused by using the flag <tt>/Gm</tt> (minimal rebuild). As this flag
is not really necessary, it is a good idea to turn it off.

<p>
Another reason for the error can be the use of the named-parameter
interface for many of the BGL algorithms. Try using the non
named-parameter version of the algorithm instead (see the HTML docs
for the algorithm in question).

<p>
Yet another reason can be the use of the <tt>get()</tt> function of
the <a href"PropertyGraph.html">PropertyGraph</a> interface. Instead
of using the <tt>get()</tt> function in a complex expression, always
declare a property map variable first:
<pre>
property_map&lt;graph_t, edge_weight_t&gt;::type w_map = get(edge_weight, g);
// use w_map ...
</pre>

<hr>

<pre>
V:\3rdPARTY\SXL\INCLUDE\xlocnum(309) : error C2587: '_U' : illegal
 use of local variable as default parameter
</pre>
<p>
Workaround from Andreas Scherer:<br>
That's the usual problem with MSVC-- 6.0 sp[34] when compiling some
(or all?) of the BGL examples.  You can't use the DLL version of the
run-time system.  I succeeded in compiling file_dependencies.cpp after
switching to ``[Debug] Multithreaded'' (section ``Code Generation'' on
page ``C/C++'' in the ``Project Settings'').

<p>
Another reason for this error is when the iterator constructor of an
<tt>adjacency_list</tt> is used. The workaround is to use
<tt>add_edge()</tt> instead. Replace something like this:
<pre>
Graph g(edge_array, edge_array + n_edges, N);
</pre>
with something like this:
<pre>
Graph g(N);
for (std::size_t j = 0; j < n_edges; ++j)
  add_edge(edge_array[j].first, edge_array[j].second, g);
</pre>

<hr>

<br>
<HR>
<TABLE>
<TR valign=top>
<TD nowrap>Copyright &copy; 2000-2001</TD><TD>
<A HREF="http://www.boost.org/people/jeremy_siek.htm">Jeremy Siek</A>,
Indiana University (<A
HREF="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</A>)<br>
<A HREF="http://www.boost.org/people/liequan_lee.htm">Lie-Quan Lee</A>, Indiana University (<A HREF="mailto:llee@cs.indiana.edu">llee@cs.indiana.edu</A>)<br>
<A HREF="http://www.osl.iu.edu/~lums">Andrew Lumsdaine</A>,
Indiana University (<A
HREF="mailto:lums@osl.iu.edu">lums@osl.iu.edu</A>)
</TD></TR></TABLE>

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